Air filter and air cleaner using high density filter paper and vehicle using the same

Abstract

Disclosed is an air filter using high density filter paper. The filter paper may include a thermally bonded non-woven fabric filter paper 10 having air permeability to filter foreign materials of passed polluted air and change the polluted air to fresh air. The non-woven fabric filter paper includes wrinkled portions 10-1 and 10-N that are folded at a predetermined interval. A thickness of the wrinkle portions 10-1 and 10-N are provided with dense layers 15 and 17 comprising a first polyethylene terephthalate (PET) fiber 20-2 that can shrink by heat and a second polyethylene terephthalate (PET) fiber 20-1 that deforms upon by heat treatment.

What is claimed is: 
     
       1. An air filter, comprising:
 a non-woven fabric filter paper configured to have air permeability and filter a foreign material of polluted air passing the air filter, 
 wherein the non-woven fabric filter paper comprises a wrinkle portion folded at a predetermined interval and the wrinkle portion comprises a dense layer comprising a first polyethylene terephthalate (PET) fiber and a second polyethylene terephthalate (PET) fiber, 
 wherein, upon heat treatment, the first PET fiber has greater shrinkage than the second PET and the second PET fiber is deformed, 
 wherein the dense layer comprises an inner dense layer comprising the second PET fiber and an outer dense layer comprising the first PET fiber in contact with the second PET fiber. 
 
     
     
       2. The air filter of  claim 1 , wherein the polluted air passing the air filter is changed into fresh air. 
     
     
       3. The air filter of  claim 1 , wherein the non-woven fabric filter paper is thermally bonded. 
     
     
       4. The air filter of  claim 1 , wherein the second PET fiber has a diameter of about 15 .mu.m and a content of the first PET is of about 5 to 20 wt % based on the total weight of the dense layer. 
     
     
       5. The air filter of  claim 4 , wherein the dense layer is formed by applying hot wind in the heat treatment process such that the first PET fiber binds to the second PET fiber. 
     
     
       6. The air filter of  claim 1 , wherein the inner dense layer further comprises an intermediate layer and a bulky layer at the other side provided with the outer dense layer. 
     
     
       7. The air filter of  claim 6 , wherein the intermediate layer is connected to the inner dense layer and the bulky layer is connected to the intermediate layer. 
     
     
       8. The air filter of  claim 1 , wherein the predetermined interval of the wrinkle portion is equal in entire section of a front end that is one end portion of the non-woven fabric filter paper and a rear end that is an end portion of the other side. 
     
     
       9. The air filter of  claim 8 , wherein the equal interval forms the wrinkle portion as a rigid rib. 
     
     
       10. The air filter of  claim 9 , wherein the rigid rib is continuously formed by folding the wrinkle portion in a shoulder-customized structure in the entire section of the non-woven fabric filter paper. 
     
     
       11. An air cleaner, comprising:
 an air filter comprising a non-woven fabric filter paper of  claim 1 ; 
 a plastic frame comprising an internal space into which the non-woven fabric filter paper having a rectangular parallelepiped shape is inserted, an urethane foam coupled to an upper surface of an edge of the plastic frame, and locking shafts coupled to left and right side surfaces of the plastic frame; and 
 an air cleaner body comprising a filter receiving space into or out which the air filter is inserted or taken. 
 
     
     
       12. The air cleaner of  claim 11 , wherein the non-woven fabric filter paper is thermally bonded. 
     
     
       13. The air cleaner of  claim 11 , wherein the air filter comprises the urethane foam to press the non-woven fabric filter paper from an upper side thereof. 
     
     
       14. The air cleaner of  claim 11 , wherein the air cleaner further comprises a sliding door configured to form the filter receiving space on one side surface to insert or take out the air filter in a drawing manner and open and close the filter receiving space in a sliding manner. 
     
     
       15. The air cleaner of  claim 14 , wherein the air filter comprises a plastic frame provided with an internal space to have front, rear, left, and right surfaces of the non-woven fabric filter paper adhere to and inserted into the same, the urethane foam that overlaps on an upper surface of an edge of the plastic frame to press the non-woven fabric filter paper from an upper side, and locking shafts coupled to left and right side surfaces of the plastic frame. 
     
     
       16. A vehicle, comprising:
 an intake system configured to supply fresh air from which foreign materials of outside air introduced into air cleaner is filtered to an engine, the air cleaner including an air filter using a non-woven fabric filter paper of  claim 1 . 
 
     
     
       17. The vehicle of  claim 16 , wherein the non-woven fabric filter paper that has a wrinkle portion filtering foreign materials of polluted air and changing the polluted air to fresh air formed in a shoulder-customized structure of a rigid rib to increase air permeability and rigidity and comprises a dense layer of a first polyethylene terephthalate (PET) fiber and a second polyethylene teraphthalate (PET) fiber, and
 wherein, upon heat treatment, the first PET fiber has greater shrinkage than the second PET and the second PET fiber is deformed. 
 
     
     
       18. The vehicle of  claim 16 , wherein the intake system comprises an intake manifold in which the fresh air flows.